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Abstract:

A monitoring system includes a reflection device, a light source, a
receiver, a light conversion device, a processor, and an indication unit.
The reflection device is located on an inner surface of a cover, and the
light source and the receiver are located on a shell. When the cover
covers the shell, light emitted from the light source can reach the
reflection device and be reflected onto the receiver. When the cover is
open, light emitted from the light source cannot reach the reflection
device and is not reflected onto the receiver. The light conversion
device converts light received by the receiver into electrical signals.
The processor receives the electrical signals and outputs a control
signal to the indication unit when the electrical signals are not
received. The indication unit is connected to the processor and indicates
that the cover is open upon receiving the control signal.

Claims:

1. A monitoring system arranged in a case which comprises a shell and a
cover detachably covered on the shell, the monitoring system comprising:
a reflection device; a light source; a receiver to receive light emitted
from the light source and reflected from the reflection device when the
cover covers the shell; a light conversion device connected to the
receiver to convert light received by the receiver into electrical
signals; a processor to receive the electrical signals from the light
conversion device and output a control signal when not receiving the
electrical signals; and an indication unit connected to the processor to
indicate that the cover is open when receiving the control signal,
wherein the reflection device is arranged on one of the shell and the
cover, and the light source and the receiver are arranged on the other
one of the shell and the cover.

2. The monitoring system of claim 1, wherein the processor records a
first time when the light conversion device stops outputting the
electrical signals and a second time when the light conversion device
starts to output electrical signals.

3. The monitoring system of claim 1, wherein the reflection device is
located on an inner surface of the cover, and the light source and the
receiver are located in the shell.

4. The monitoring system of claim 1, wherein the reflection device is
located in the shell, and the light source and the receiver are located
on an inner surface of the cover.

5. The monitoring system of claim 1, wherein the indication unit is a
light emitting diode (LED), an anode of the LED is connected to an output
pin of the processor, a cathode of the LED is grounded, wherein the
control signal is a high voltage level signal.

6. The monitoring system of claim 1, wherein the reflection device is a
mirror.

7. The monitoring system of claim 1, wherein the indicating device is a
buzzer, wherein a positive terminal of the buzzer is connected to an
output pin of the processor, and a negative terminal of the buzzer is
grounded.

Description:

BACKGROUND

[0001] 1. Technical Field

[0002] The present disclosure relates to a monitoring system for a case of
an electronic device.

[0003] 2. Description of Related Art

[0004] When servers are opened, notification systems called "intruders"
are used to inform a user that the server is opened. The intruder is also
used to record information about the servers in an opened state. However,
the intruder is mechanical and may become insensitive after being used
for a period of time.

[0005] Therefore, there is room for improvement in the art.

BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Many aspects of the present disclosure can be better understood
with reference to the following drawing(s). The components in the
drawing(s) are not necessarily drawn to scale, the emphasis instead being
placed upon clearly illustrating the principles of the present
disclosure. Moreover, in the drawing(s), like reference numerals
designate corresponding parts throughout the several views.

[0007] FIG. 1 is a schematic diagram of an embodiment of a monitoring
system of the present disclosure.

[0008] FIG. 2 is a block diagram of the monitoring system of FIG. 1.

[0009] FIG. 3 is a circuit diagram of the monitoring system of FIG. 1.

[0010] FIG. 4 is a circuit diagram of another embodiment of the monitoring
system of FIG. 1.

DETAILED DESCRIPTION

[0011] The disclosure is illustrated by way of example and not by way of
limitation in the figures of the accompanying drawings in which like
references indicate similar elements. It should be noted that references
to "an" or "one" embodiment in this disclosure are not necessarily to the
same embodiment, and such references mean "at least one."

[0012] FIGS. 1-3 show an embodiment of a monitoring system 100.

[0013] The monitoring system 100 is used to monitor an open and closed
state of a case of an electronic device, such as a server. The case
includes a shell 2 and a cover 1 detachably mounted on the shell 2. A
motherboard (not shown) and other chips (not shown), such as central
processing units, are located inside the shell 2. The cover 1 covers the
shell 2 to shield the motherboard and the other chips.

[0014] The monitoring system 100 includes a reflection device 10, a light
source 12, a receiver 16, a light conversion device 18, a processor 20,
and an indication unit 22. The reflection device 10 is located on an
inner surface of the cover 1 and faces an interior of the shell 2. The
light source 12 and the receiver 16 are located on a surface of the shell
2 facing the reflection device 10. When the cover 1 covers the shell 2,
light emitted from the light source 12 reaches the reflection device 10
and is reflected to the receiver 16. In one embodiment, the light source
12 and the receiver 16 are located on the motherboard, and the reflection
device 10 is a mirror.

[0015] The receiver 16 is electrically connected to the light conversion
device 18. The light conversion device 18 is used to convert light
received by the receiver 16 into electrical signals. The light conversion
device 18 is connected to the processor 20.

[0016] When the cover 1 is open, light emitted from the light source 12
cannot reach the reflection device 10, so the processor 20 cannot receive
electrical signals from the light conversion device 18. The processor 20
outputs a control signal to the indication unit 22, and the indication
unit 22 operates to indicate that the cover 1 is open. The processor 20
records a first time when the light conversion device 18 stops outputting
electrical signals, and a second time when the light conversion device 18
starts to output electrical signals. In one embodiment, the indication
unit 22 is a light-emitting diode (LED). An anode of the LED is connected
to an output pin Out of the processor 20. A cathode of the LED is
grounded. In one embodiment, the processor 20 is a base management
controller connected to the light conversion device 18 through an input
pin In to receive electrical signals. When the processor 20 is not
receiving electrical signals from the light conversion device 18, the
processor 20 outputs a high-level signal, such as logic 1, to the anode
of the LED through the output pin Out. Thus, the LED is lit up to
indicate that the cover 1 is open. In another embodiment, the indication
unit 22 is a buzzer 23 (see FIG. 4). A positive terminal of the buzzer 23
is connected to the output pin of the processor 20. A negative terminal
of the buzzer 23 is grounded. The processor 20 can be a central
processing unit.

[0017] Positions of the reflection device 10, the light source 12, and the
receiver 16 can be changed as long as when the cover 1 covers the shell
2, light emitted from the light source 12 can reach the reflection device
10, and light reflected by the reflection device 10 can reach the
receiver 16, and when the cover 1 is open, light emitted from the light
source 12 cannot reach the reflection device 10, and light reflected by
the reflection device 10 cannot reach the receiver 16. In one embodiment,
the reflection device 10 is located on the motherboard, and the light
source 12 and the receiver 16 are located on the cover 1.

[0018] While the disclosure has been described by way of various
embodiments, it is to be understood that the disclosure is not limited
thereto. To the contrary, it is intended to cover various modifications
and similar arrangements as would be apparent to those skilled in the
art. Therefore, the range of the appended claims should be accorded the
broadest interpretation so as to encompass all such modifications and
similar arrangements.